CHLOROPHYLL AND CAROTENOID CONCENTRATIONS IN 2 VARIETIES OF PINUS-PONDEROSA SEEDLINGS SUBJECTED TO LONG-TERM ELEVATED CARBON-DIOXIDE
CHLOROPHYLL AND CAROTENOID CONCENTRATIONS IN 2 VARIETIES OF PINUS-PONDEROSA SEEDLINGS SUBJECTED TO LONG-TERM ELEVATED CARBON-DIOXIDE
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DOI：
10.1093/treephys/4.2.187
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发表时间：
1988-06-01
期刊：
影响因子：
4
通讯作者：
SHINN, JH
中科院分区：
文献类型：
--
作者：
HOUPIS, JLJ;SURANO, KA;SHINN, JH
美国黄松（Pinus ponderosa Dougl.）变种scopulorum（Rocky Mountain variety）和P. ponderosa var.黄松（Sierran品种））幼苗经受升高的大气CO2两年半。CO2浓度为环境浓度、环境浓度+ 75 μ l l-1、环境浓度+ 150 μ l l-1和环境浓度+ 300 μ l l-1，或约350、425、500和650 μ l l-1 CO2。经过一年半的高浓度CO2暴露，直到研究结束，两个品种的幼苗表现出应激症状，包括斑驳，中针脱落和早衰。在两个品种中，暴露于大于环境+75 μ l l l-1的CO2浓度导致较低的叶绿素a、叶绿素B和类胡萝卜素浓度。在升高的CO2浓度下，Sierran品种针叶中的色素浓度低于落基山品种。此外，在CO2浓度升高，色素浓度在1岁的针叶的P.西黄松品种低于那些在当季针叶。
Two varieties of ponderosa pine (Pinus ponderosa Dougl. var. scopulorum (Rocky Mountain variety) and P. ponderosa var. ponderosa (Sierran variety)) seedlings were subjected to elevated atmospheric CO2 for two and a half years. The CO2 concentrations were ambient, ambient + 75 .mu.l l-1, ambient + 150 .mu.l l-1 and ambient + 300 .mu.l l-1, or approximately 350, 425, 500 and 650 .mu.l l-1 CO2. After one and a half years of exposure to elevated CO2 and until the end of the study, seedlings of both varieties showed symptoms of stress including mottling, mid-needle abscission and early senescence. In both varieties, exposure to CO2 concentrations greater than ambient + 75 .mu.l l-1 resulted in lower chlorophyll a, chlorophyll b and carotenoid concentrations. At elevated CO2 concentrations, the concentrations of pigments in needles of the Sierran variety were lower than those in the Rocky Mountain variety. Also, at elevated CO2 concentrations, the pigment concentrations in the 1-year-old needles of both P. ponderosa varieties were lower than those in current-season needles.